Most recent scikit-learn results in several failed unit tests

[it176131]

Describe the bug

Using scikit-learn version 1.3.1 and higher results in several failed unit tests.

See comments in #1087 for more details.

Steps/Code to Reproduce

pip install scikit-learn==1.3.1
pytest mlxtend

Expected Results

All existing unit tests should pass.

Actual Results

Several unit tests fail.

Versions

MLxtend 0.23.1
Windows-10-10.0.22631-SP0
Python 3.11.7 (tags/v3.11.7:fa7a6f2, Dec 4 2023, 19:24:49) [MSC v.1937 64 bit (AMD64)]
Scikit-learn 1.3.1
NumPy 1.26.4
SciPy 1.12.0

[it176131]

Closing this as #1091 was merged.